I am so sorry to hear about that, it is very heartbreaking and tragic for someone to go through!! All my thoughts and sympathy for your cousin! She is very lucky to have you to care for her, this is a super nice and thoughtful idea.
1. Close2You Towel & Dona, Principessa or Simply Sensual bath set (scrub, wash and lotion, maybe perfume).
2. Massage oil, lotion and massager with the towel.
3. Belle il Fiore products look elegant, maybe with a candle.
4. A good book or movie, super comfy robe and a small assortment of flavored coffees, or candies.